The authors then wished to explore in depth the reasons for this failure to use available
artillery in recognizing errors, so the next 24 pages of the paper are all about an extensive
interview with one particular 3rd or 4th grade student named Marcia. In that interview Marcia
was asked about every possible step on her road down the primrose path to the wrong
answer. She was asked for her reasoning in every step that she took -- she was even asked
if she wanted to write in a different color of ink – to no avail. She was resolutely unable to
pay up her borrowed digits and get the right answer, despite extensive cajoling, directions
and hints. This interview begins on page 51 and ends on page 74.